In order to solve for x in the equation 2x + 3 = 9 to isolate x on one side of the equation.
Our first step is to subtract 3 from each side of the equation to get x by itself. Since we are doing the same thing to each side of the equation we're not changing anything. But now we have 2x by itself on the left of the equation and 6 on the right-hand side.
Then we can divide both sides of the equation by 2. When we do this 2x/2 is just x and we have 6/2 on the right-hand
x = 6/2
x = 3
If we put 2 in for x in the equation 2x + 3 = 9 we'll end up with 9 = 9 which tells us that we have solved for x correctly. It always a good idea to check when solving linear equations to make sure you found the correct value for x.
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How to graph Linear Equations: [ Ссылка ]
Chapters
0:00 Solving for x (Step 1)
0:27 Step 2 (Isolate 2x)
0:43 Step 3 (Simplify to Just x)
0:59 Check Your Work
